Method of urination and defecation in space

Abstract

The disclosure belongs to the field of aerospace technology, and in particular relates to a method of urination and defecation in space. The method may include: forming a sealed space between a spacesuit below the waist and above the two thighs and the human skin before an astronaut urinates or defecates, and using, by the astronauts, the sealed space to urinate or defecate. The disclosure can confine the excrements in a small sealed space, and the operation thereof is simple, convenient and fast, and no excessive cost is required, and no pollution is caused in the spacesuit and the cabin, facilitating the astronauts' work in space.

The invention claimed is: 
     
       1. A method of waste collection in space, comprising:
 binding straps around an astronaut's waist and two thighs to form a sealed space between a spacesuit and a skin of the astronaut, below the astronaut's waist and above the astronaut's two thighs, before the astronaut urinates or defecates; 
 pressurizing the sealed space to thereby provide a clear passage in the sealed space, wherein said pressurizing also provide an air flow; flushing excrements in the sealed space with the air flow provided by said pressurizing; and 
 automatically loosening the straps after the astronauts' urination or defecation in the sealed space and upon completion of said flushing; 
 wherein a circle of elastic sealing tape is provided on an inner side of the spacesuit adjacent to a skin area corresponding to one of the straps to obtain a sealing effect between a binding position of the spacesuit and the skin, and the elastic sealing tape is soft. 
 
     
     
       2. The method according to  claim 1 , further comprising:
 providing a gas pumping mechanism as well as a spraying and flushing mechanism inside the sealed space, and providing a suction device and a sealed device outside the sealed space, wherein an input end of the suction device is connected to the sealed space through a first pipe, and an output end of the suction device is connected to the sealed device through a second pipe; 
 during the astronaut's urination or defecation, the gas pumping mechanism and the suction device functioning to suck the excrements into the sealed device; and 
 after the astronaut's urination or defecation, the gas pumping mechanism and the spraying and flushing mechanism providing the air flow to flush the excrements adhered to an inner side of the spacesuit and the skin in the sealed space, and then the suction device continuing suction of the flushed excrements into the sealed device, 
 wherein the gas pumping mechanism provides said pressurizing the sealed space to prevent the spacesuit from sticking to the skin, and the air flow facilitates the excrements to be flushed toward the suction device. 
 
     
     
       3. The method according to  claim 2 , wherein the first pipe is provided with a first reflux valve. 
     
     
       4. The method according to  claim 2 , wherein the second pipe is provided with a second reflux valve. 
     
     
       5. The method according to  claim 2 , wherein the sealed device is a sealed bag, and the sealed bag is suitable to be hung on the spacesuit. 
     
     
       6. The method according to  claim 2 , wherein the sealed device is a sealed box, said sealed box being disposed in a spaceship or in a space station.